Each month, the charge for a racquet club membership consists of a flat fee of $15, plus $3 each time equipment is rented. Which of the following equations represents the total monthly charge, M(r) dollars,
for the membership as a function of the number of times equipment is rented, r ?
A. M(r) = 3(15)r
B. M(r) = (3 + 15)r
C. M(r) = 3r + 15
D. M(r) = 15r +3
E. M(r) = r +3+15

I think its B (I'm so sorry if its wrong)

Step-by-step explanation:

it's $15 a month plus $3 every time u go, so you add those two numbers.

You dont know r, but u have to multiply it.

5104.38 inches

step-by-step explanation:

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.